1. Progress of Home Energy Station Ⅳ system NHA Annual Conference 2008 April 2nd 2008 Honda R&D Co.,Ltd. Hisashi Nagaoka

2. 1.History 2.Program Aim 3.Design Concept 4.Progress of HES Program 5.HES Series 6.Specifications 7.System Flow 8.Operation Mode 9.Device Configuration 10.System Efficiency 11.Energy Cost and CO 2 Emission 12.Conclusion Contents

3. ‘ ９９ ‘ ００ ‘ ０１ ‘ ０２ ‘ ０３ ‘ ０４ FCX-V2FCX-V3 Methanol Reforming FCV H.P. Tank FCV -20 ℃ Cold Start ‘ ０５ ‘ ０６ ‘０7‘０7 Honda FC Stack HESI HES2 HES3 HES4 FCX Solar-powered Hydrogen Station Natural Gas Reforming Home Energy Station History

4. Program Aim ➤ Evaluate the system under “Real World” condition ➤ Verify the potential of the system for CO 2 reduction ➤ Feasibility study of Honda’s unique refueling means for FCV

5. Hot Water Electricity Space Heat Design Concept Home-size combined system, which provides Hydrogen to FCV while supplying Electricity and Heat to household H2 for FCV

6. Progress of HES Program HES IV ➤ High Efficiency ➤ Evaluate under “Real World” condition ➤ Downsizing HES III ➤ Load profile traceability ➤ Quick Start-up and Shut-down HES II ➤ Improve system efficiency ➤ Downsizing HES I ➤ Verify basic potential of Home Energy Station ➤ Propose unique energy distribution concept

7. Specifications HES Series IIIIIIIV Power Output H 2 Storage H 2 Purity Max Pressure System Size Test Site Operation 5.04.05.04.0kW SLM H 2 Production Kg-H 2 % MPa Liter 34 5250 11.93.35.2- >99.99 42355035 4500200014001200 Torrance, CALatham, NYTorrance, CA ’03/10 - ’05/6’04/11 - ’06/3’05/11 - ’07/6’07/10-

8. Specifications Specification Natural Gas Start Up Time Filling Pressure Max Power Output Efficiency 50 35 4 SLM MPaG kW H 2 Flow Rate SAE J2719 Eq. H 2 Purity 10 min 54dB H 2 Mode Power Mode Noise 13 kW 40 % 30 % 1455mm 1330mm 705mm

9. System Flow Grid Natural Gas Reforming DMS (FC or H 2 Pump) Hydrogen Compressor Electricity Heating FCV PSA ～ Inverter

10. Operation Mode Grid Natural Gas Reforming DMS (H2 Pump) Hydrogen Compressor Electricity Heating FCV PSA ～ Inverter Hydrogen Mode ➤ Generating Hydrogen ➤ Charge Compressed H 2 to FCV ➤ Perform Overnight Fill

11. Operation Mode Grid Natural Gas Reforming Hydrogen Compressor Electricity Heating FCV PSA ～ Inverter Power Mode ➤ Generating Electricity ➤ Export Electricity to Grid DMS (Fuel Cell)

12. Operation Mode 66121824 Power Mode 5.5 h H 2 Mode 6 h Thermal Demand Time Operation Typical Operation Pattern

13. Reformer Unit Natural Gas DI Water Air Technology Specification Reformer Type Reformed H 2 Flow ATR+WGS+PROX 65 SLM ➤ Quick Start-up and Shut-down ➤ Concentric structure ⇒ Heat balance, efficiency and insulation ➤ Integrated tube-less structure ATR WGS PROX1 PROX2

14. Dual Mode Stack Reformate H 2.H 2 O Exhaust Power Supply Cathode H+H+ Reformate Air Exhaust e-e- Fuel Cell Hydrogen Pump Anode Cathode H+H+ Technology ➤ Fuel Cell and H 2 Pump Combined stack ➤ Hydrogen purify and pressurize (H 2 Pump) Max Power H 2 Flow Rate Discharge Press. 5.5 65 0.8 kW SLM MPaG Specification Anode

15. Technology Pressure Swing Adsorption ➤ Two-vessel type small size PSA ➤ Optimize adsorbent for reformed gas ➤ Integrated valve layout ➤ Off-gas recycling ➤ Washing adsorbent during shutting down for next operation Specification Operating Temp. Cycle Time Adsorption Press. Desorption Press. Adsorbent 45 90 0.8 Atmosphere Activated Carbon ℃ sec MPaG Inlet Valve Manifold Outlet Valve Manifold Adsorption Vessel

16. Hydrogen Compressor ➤ Special design for H 2 compression ➤ High-pressure(35MPa) capable ➤ Oil free design ➤ Extremely small size Technology Specification Type Discharge Press. Power Weight Size 55 35 1.2 Air-Cooled 4 Stages Oil Free Compressor SLM MPaG kW Flow Rate 0.8 MPaG Suction Press. 76 kg 43 Liter DC Brushless Motor 4-Stage Piston Compressor

17. Dispenser & User Interface User Interface Nozzle Technology ➤ Simple method to Refuel ➤ User friendly interface

18. System Efficiency Grid 3.5kW Fuel Processor H 2 9kW Efficiency 40% Hydrogen Mode H 2 Comp. Power 4 kW Efficiency 30% Power Mode Natural Gas 13kW Natural Gas 13 kW Power Mode Efficiency = 4/13 = 30.8% H 2 Mode Efficiency = 9/(13+3.5/0.38) = 40.5% Inverter PSA DMS Fuel Processor DMS

19. Energy Cost & CO 2 Emission Energy Cost ICE + Grid FCX + HES 100020003000 [$/Year] CO 2 Emission 51015 [Ton/Year] ICE + Grid FCX + HES ElectricityCarHeat ElectricityCarHeat -54% -30%

20. Conclusion Advantage of Home Energy Station ➤ Offer a convenient H 2 refueling means for FCV at home ➤ Contribute to the dissemination of FCVs ➤ Reduce CO 2 emissions ➤ Save energy costs Ongoing Validation Test ➤ Ongoing at Torrance, CA ➤ Provides real world R&D activities ➤ Refueling H 2 to FCV and supplying electricity to building

21. Thank you for your interest